Poincare plot for hrv

Question

Olga 2011-12-29

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/24958-poincare-plot-for-hrv

Hello, I'm writing an application to analize HRV and I have a problem with the Poincare plot. I've done the SD1 and SD2 parameters but I don't know how to vizualize the plot. Can anybody help me in this matter? I'll be very grateful ;)

that is what I've done:

%Poincare plot
xp=odstepRR;
xp(end)=[];
xm=odstepRR;
xm(1)=[];
%SD1
SD1 = std(xp-xm)/sqrt(2);
set(handles.sd1, 'string', num2str(SD1*1000));
%SD2
SD2 = std(xp+xm)/sqrt(2);
set(handles.sd2, 'string', num2str(SD2*1000));
%SDRR
SDRR=sqrt(SD1^2+SD2^2)/sqrt(2);
set(handles.sdrr, 'string', num2str(SDRR*1000));